IMAGE RECONSTRUCTION FROM LIMITED OR INCOMPLETE DATA

摘要

A system and method (500) are provided for reconstructing images from limited or incomplete data. The system and method iteratively constrains the variation of an estimated image. A divergent beam may be used to generate actual data. The actual data are less than sufficient to exactly reconstruct the image by conventional techniques. To reconstruct an image, a first estimated image is generated. Estimated data is generated from the first estimated image, and compared with the actual data (506). This comparison action includes determining a difference between the estimated and actual data. The comparison is then used to generate a new estimated image with combining the first estimated image and an image generated from the difference data. For the next iteration, the variation of the new estimated image is constrained (510), at least partly to reduce the total variation of the image.